Accurate pursuit photography used to be difficult to do cheaply until the temporal test pattern (TestUFO animation) invented by Chief Blur Buster Mark Rejhon. It is now easily achieved by hand-sliding a common camera on a common camera rail, while taking picture of on-screen panning motion. The temporal test pattern records the tracking error of a hand-driven tracking camera. You simply repeat hand-driven camera passes until the target tracking accuracy is achieved, thanks to super-easy error-margin verification (instructions) via temporal test pattern.